Bivouac bag



FIG. 1 is a front elevational view of a bivouac bag, showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines shown throughout the various figures represent stitching. 

The ornamental design for a bivouac bag, substantially as shown and described. 